Page 3
LANCOM Systems shall be liable only to the degree specified in the terms of sale and delivery. The reproduction and distribution of the documentation and software included with this product is subject to written per- mission by LANCOM Systems. We reserve the right to make any alterations that arise as the result of technical develop- ment.
Page 4
LANCOM L-54g Wireless, complying to the 802.11g standard in the 2,4 GHz band, which is downward-compatible to 802.11b devices. This opens a vast range of possibilities where to use the LANCOM L-54g Wireless: at the bureau, in open spaces or to interconnect LANs.
Page 5
It also contains all of the important technical specifications. The reference manual can be found on the LANCOM product CD as an Acrobat (PDF) document. It is designed as a supplement to the user manual and goes into detail on topics that apply to a variety of models.
Page 6
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Preface Furthermore, the knowledgebase offers you a large reserve of infor- mation. The latest drivers, firmware, utilities and documentation are constantly available for download. In addition, LANCOM support is available. For telephone numbers and contact addresses of LANCOM support, please see the enclosed leaf- let or the LANCOM Systems website.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Contents Contents 1 Introduction 1.1 What is a wireless LAN? 1.1.1 Modes of operation of wireless LANs and access points 9 1.2 What can your LANCOM do? 2 Installation 2.1 Package contents...
Page 8
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Contents 4 Security settings 4.1 Security for the Wireless LAN 4.1.1 Closed network 4.1.2 Access control via MAC address 4.1.3 LANCOM Enhanced Passphrase Security 4.1.4 Encryption of the data transfer 4.1.5 802.1x / EAP...
Page 9
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Contents 7 Options and accessories 7.1 Optional LANCOM WLAN antennas 7.1.1 Antenna Diversity 7.1.2 Installation of AirLancer Extender antennas 7.2 LANCOM Public Spot Option 8 Troubleshooting 8.1 No DSL connection is established 8.2 DSL data transfer is slow...
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 1: Introduction 1 Introduction What is a wireless LAN? The following sections describe the functionality of wireless networks in general. You can see from the table 'What your LANCOM can do' further below which functions your device supports.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 1: Introduction Establishing access to the Internet Connecting two LANs over a wireless link (point-to-point mode) Connecting devices with an Ethernet interface via an access point (client...
Page 12
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 1: Introduction LANCOM LANCOM LANCOM L-54g L-54ag L-54 dual Wireless Wireless Wireless ✔ Wireless transmission by IEEE 802.11b/g and IEEE 802.11a/h at the same time ✔ ✔...
Page 13
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 1: Introduction LANCOM LANCOM LANCOM L-54g L-54ag L-54 dual Wireless Wireless Wireless ✔ ✔ ✔ Connection for DSL or cable modem ✔ ✔ ✔ Connection for serial modem Internet access (IP router) ✔...
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 2: Installation 2 Installation This chapter will assist you to quickly install hardware and software. First, check the package contents and system requirements. The device can be installed and configured quickly and easily if all prerequisites are fulfilled.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 2: Installation Wireless LAN adapter or LAN access (if the access point is to be connected to the LAN). The LANtools also require a Windows operating system. A web ...
Page 16
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 2: Installation ³ Power · WLAN Link (1+2) Meanings of the LEDs In the following sections we will use different terms to describe the behaviour of the LEDs: Blinking means, that the LED is switched on or off at regular intervals in the respective indicated colour.
Page 17
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 2: Installation Orange/green In the housing At least one WLAN module is in managed mode and cover; blinking has not found a WLAN Controller yet. The correspond-...
Page 18
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 2: Installation Provides information about the WLAN connections via the internal WLAN module. The following can be displayed for WLAN link: No WLAN network defined or WLAN module deacti- vated.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 2: Installation green regularly blinking connection establishing DSL over LAN green on with short inter- DSL over LAN active (e.g. PPPoE via LAN access) ruptions orange network device connected; transfer rate 100 Mbps (The...
Page 20
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 2: Installation ing with PoE in the info box ’Power-over-Ethernet – elegant power supply → through the LAN wiring’ Page 20. By activated DSLoL option, the LAN connector can also be used for con- necting the LANCOM Access Point to a broadband modem.
Page 21
ard! For damages caused by inadmissible devices no warranty may be claimed. For the LANCOM L-54 dual Wireless, two LAN sockets can be used for redundant power supply. The device itself selects the power source to be used. If a power outage causes a switch between power sources, the device reboots so that the power feed is reactivated, if appropriate.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 2: Installation Reset-or-boot (standard setting): Press the button briefly to restart the device. Pressing the button for 5 seconds or longer restarts the device and resets the configuration to its factory settings. All LEDs on the device light up continuously.
Page 23
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 2: Installation For information about the installation of PoE see the info box ’Power- over-Ethernet – elegant power supply through the LAN wiring’ → Page 20. DSLoL – If you want to use your access point in DSLoL mode, you can either connect the device directly to the DSL modem (exclusive mode) or to a hub resp.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 2: Installation Use only the supplied power supply unit! The use of the wrong power supply unit can be of danger to the device or persons.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 2: Installation 2.3.2 Which software should I install? LANconfig is the Windows configuration program for all LANCOM models. WEBconfig can be used alternatively or in addition via a web browser.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 3: Basic configuration 3 Basic configuration The basic configuration is conducted with a convenient Setup Wizard that provides step-by-step guidance through the configuration and that requests any necessary information.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 3: Basic configuration Protecting the configuration Wireless LAN details Security settings 3.1.1 TCP/IP settings TCP/IP configuration can be performed in two different ways: Either fully auto- matically or manually. No user input is required if TCP/IP configuration is per- formed automatically.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 3: Basic configuration and would like to assign it a user-defined address from one of the address ranges reserved for private use, for example '10.0.0.1' with a network mask of '255.255.255.0'. If you do this you simultaneously...
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 3: Basic configuration nistrators can be set up for a Access Point. Further information can be found in the LCOS reference manual under “Managing rights for dif- ferent administrators”.
If the setup wizard does not start automatically, start a manual search for new devices on all ports (if the LANCOM is connected via a serial port) or in the network (Device Find). If the setup wizard does not start automatically, start a manual search ...
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 3: Basic configuration If you would like to configure the TCP/IP settings manually, assign an avai- lable address from a suitable address range to the LANCOM. Confirm your choice with Next.
Page 32
LANCOM or by its IP address 172.23.56.254. http://LANCOM http://172.23.56.254 If the configuration PC does not obtain its IP address from the LANCOM DHCP server, figure out the current IP address of this PC (with Start Execute cmd and command ipconfig at the prompt under Windows 2000 or Windows...
Page 33
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 3: Basic configuration If there is a DNS server for name resolution in the LAN, which interchan- ges the assignment of IP addresses to names with the DHCP server, then the device can be accessed by the name “LANCOM <MAC address>”...
Page 34
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 3: Basic configuration The setup wizards are tailored precisely to the functionality of the spe- cific LANCOM model. As a result, your device may offer different wizards than those shown here.
Page 35
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 3: Basic configuration Enter the wireless parameters. Select a network name (SSID) and a radio channel. Turn on if necessary the function for ’closed network’. Confirm your choice with Next.
DNS server – translates network names (www.lancom.de) or names of computers (www.lancom.de) to actual IP addresses. The LANCOM can perform the functions of both a default gateway and a DNS server. In addition, as a DHCP server it can also automatically assign valid IP addresses to all of the computers in the LAN.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 4: Security settings 4 Security settings Your LANCOM device has numerous security functions. You find in this chapter all information needed for an optimal protection of the base station.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 4: Security settings 4.1.2 Access control via MAC address Each network device has an special identification number. This identification number is the so-called MAC address (Media Access Control), which is world- wide unique per device.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 4: Security settings 4.1.4 Encryption of the data transfer A special role comes up to the encryption of data transfer for Wireless LANs. For IEEE 802.11 radio transfer the supplementing encryption standards are 802.11i/WPA and WEP.
By means of IPSec over WLAN a radio network can be optimally secured in addition to the already introduced securing mechanisms. In order to run IPSec over WLAN you have to upgrade the base stations of the with the LANCOM VPN option and the LANCOM Advanced VPN Client, which runs under the operating systems Windows Vista , Windows 2000 and Windows XP.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 4: Security settings The device locks access to its configuration for a specified period of time after a certain number of failed log-in attempts. Both the number of failed attempts and the duration of the lock can be set as needed.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 4: Security settings The wizard will inform you when entries are complete. Complete the con- figuration with Finish. 4.3.2 Wizard for WEBconfig Under WEBconfig you have the possibility to run the wizard Security settings to control and change the settings.
Page 43
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 4: Security settings address that is permanently programmed into wireless network adapters. To check the access-control list, go to the configuration area in LANconfig and select ‘WLAN security’ on the ‘Stations’ tab.
Page 44
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 4: Security settings Are you using a 'deny all' firewall strategy? Maximum security and control is initially achieved by denying all data traffic from passing the firewall. The only connections to be accepted by the firewall are those that are to be explicitly permitted.
Page 45
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 4: Security settings Do you store your saved LANCOM configuration to a safe location? Protect your saved configurations in a location that is safe from unautho- rized access. Otherwise, by way of example, an unauthorized person may load your stored configuration file into another device and they can access the Internet at your expense.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 5: Advanced wireless LAN configuration 5 Advanced wireless LAN configuration Highly convenient installation wizards are available to help you with the con- figuration of LANCOM Access Points for your wireless LAN.
Page 47
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 5: Advanced wireless LAN configuration WLAN module operation The WLAN modules can be operated in various operating modes: As a base station (Access Point mode), the device makes the link between WLAN clients and the cabled LAN.
Point-to-point connections. Point-to-point connections LANCOM Access Points can serve not only as central stations in a wireless net- work, they can also operate in point-to-point mode to bridge longer dis- tances. For example, they can provide a secure connection between two networks that are several kilometers apart —...
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 5: Advanced wireless LAN configuration the result that they do not find each other. This stalemate situation can be avoided with the appropriate "Channel selection scheme": Master: This access point takes over the leadership when selecting a free WLAN channel.
Page 50
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 5: Advanced wireless LAN configuration Selection of antennas using the LANCOM Antenna Calculator You can use the LANCOM Antenna Calculator to calculate the output power of the access points as well as the achievable distances and data rates. The program can be downloaded from our website at www.lancom.eu.
Page 51
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 5: Advanced wireless LAN configuration Positioning the antennas Antennas do not broadcast their signals linearly, but within an angle that depends on the model in question. The spherical expansion of the signal waves results in amplification of or interference to the effective power output at certain intervals of the connection between the transmitter and receiver.
Page 52
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 5: Advanced wireless LAN configuration The areas where the waves amplify or cancel themselves out are known as Fresnel zones. Protecting the components employed from the consequences of ...
Page 53
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 5: Advanced wireless LAN configuration To ensure that the Fresnel zone 1 remains unobstructed, the height of the antennas must exceed that of the highest obstruction by this radius. The full...
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 5: Advanced wireless LAN configuration Free-space loss Amplification with Amplification with antenna gain antenna gain ANTENNA ANTENNA Loss through Loss through cable, plugs and cable, plugs and...
Page 55
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 5: Advanced wireless LAN configuration The display of signal quality on the LEDs must be activated for the wireless LAN interface (LANconfig: Wireless LAN General Physical WLAN settings Operation).
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 5: Advanced wireless LAN configuration Are both antennas approximately aligned? The basic P2P connection has to be working before fine-tuning can be performed with the aid of LANmonitor.
Page 57
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 5: Advanced wireless LAN configuration P2P connections are to be identified via their station names, then enter a unique name for this WLAN station. For models with multiple WLAN modules, the station name can be ...
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 5: Advanced wireless LAN configuration You will find the WLAN MAC address on a sticker located under each of the antenna connectors. Only use the string that is marked as the "WLAN MAC"...
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 5: Advanced wireless LAN configuration The use of relay stations each equipped with two WLAN modules simultaneously solves the problem of the "hidden station", by which the MAC addresses of the WLAN clients are not transferred over mul- tiple stations.
Page 60
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 5: Advanced wireless LAN configuration The encryption settings for the individual logical WLAN networks can be Configuration with WEBconfig or Telnet found under WEBconfig or Telnet under the following paths:...
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 5: Advanced wireless LAN configuration Configuration with The access list for the matching of MAC addresses to the passphrases (LEPS) WEBconfig or Telnet can be found under WEBconfig or Telnet under the following paths:...
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 5: Advanced wireless LAN configuration DRUCKER WLAN device in client mode ACCESS POINT WLAN device in client mode SERVER ACCESS POINT ACCESS POINT WLAN device in AP mode...
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 5: Advanced wireless LAN configuration In 'Scan bands', define whether the client station scans just the 2.4 GHz, just the 5 GHz, or all of the available bands to locate an access point.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 5: Advanced wireless LAN configuration Under WEBconfig or Telnet the network settings for the logical WLAN interfaces can be found under the following paths: Configuration tool Menu/Table...
Page 65
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 5: Advanced wireless LAN configuration For TTLS and PEAP - the EAP/TLS root certificate only; the key is ente- red as a combination username:password. For TLS in addition; the EAP/TLS device certificate including the private key.
Chapter 6: Setting up Internet access 6 Setting up Internet access The LANCOM provides a central point of Internet access for all of the compu- ters in the LAN. The connection to the Internet provider can be established via the WAN connection which is connected to an ADSL or cable modem. For models not equipped with a WAN connector, a LAN interface is configured as a DSLoL connector and is connected to a compatible ADSL modem.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 6: Setting up Internet access In case of flatrate billing you can also set up line polling to monitor the function of the remote station. Apart from that you can opt to keep flatrate connections permanently active ("keep-alive").
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 6: Setting up Internet access 6.1.2 Instructions for WEBconfig Select the entry Set up Internet connection from the main menu. In the following windows you select your country, your Internet provider if possible, and you enter your access data.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 6: Setting up Internet access In the windows that follow you select the services/protocols that the rule is to relate to. In the next step you define the source and destination sta- tions that the rule applies to, and the actions that are to be carried out by the rule on a data packet.
Wireless Public Spot. Optional LANCOM WLAN antennas To increase the range of the LANCOM base station or to adapt the base station to special conditions of environs, you can connect LANCOM WLAN antennas at the base station. An overview of suitable antennas can be found on the LANCOM web site under www.lancom.eu.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 7: Options and accessories 7.1.1 Antenna Diversity The transmission of radio signals can suffer from significant signal losses because of reflection and scatter, among other reasons. In some areas, the interaction with the reflected radio waves can cause a drop in signal strength, or even cause it to be cancelled out completely.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 7: Options and accessories LANCOM L-54g ’Antenna Main’ connector for AirLancer antenna Wireless LANCOM L-54ag Wireless Reset Antenna Aux AC 12 V LAN 10/100 Mb Antenna Main...
Page 73
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 7: Options and accessories Accounting data (online time and data volume) can be transferred per user and per session to a central RADIUS server. Client PCs need only radio card (e.g.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 8: Troubleshooting 8 Troubleshooting In this chapter, you will find suggestions and assistance for a few common dif- ficulties. No DSL connection is established After start-up the router automatically attempts to connect to the DSL pro- vider.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 8: Troubleshooting Increasing the TCP/IP window size under Windows If the actual transfer rate of a DSL connection is significantly below the fastest rate listed by the provider, there are only a few possible causes (apart from the above-mentioned external factors) which may involve one's own equipment.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Chapter 9: Appendix Declaration of conformity LANCOM Systems herewith declares that the devices of the type described in this documentation are in agreement with the basic requirements and other relevant regulations of the 1995/5/EC directive.
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Index Index Numerics DNS server 10/100Base-TX Documentation 100Mbp network Download 802.11i 802.1x provider 802.3af- standard transfer protocol DSL connection problems establishing the connection Access point mode DSL transfer protocol...
Page 80
LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless Index Internet-Zugang Power-over-Ethernet Public Spot Option Block ports Filter RADIUS IP address Remote configuration IP masquerading Reset switch IP router Reset the toll protection IP-Router Routing table LAN connection...
Need help?
Do you have a question about the L-54g Wireless and is the answer not in the manual?
Questions and answers